Expressing Permission, Obligation and Prohibition Using Modals
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discussion
Modal Verbs: Prohibition, Obligation and Permission When we want to express permission, prohibition (not allowing something), obligation or no obligation, we use modal verbs.
A. Prohibition – can’t, mustn’t Can't and mustn't (must not) are used to show that something is prohibited or not allowed.
Examples: You can't go into that restaurant without a tie. You can't drive in this country unless you are over eighteen. You mustn't use your phone in class. Can't usually gives the idea of something that is against the rules. Mustn’t usually means that it is the speaker who is setting the rule.
B. Obligation – have to, must Have to and must are both used to express obligation. There is a slight difference in the way both are used. Have to shows that the obligation comes from someone else, not the speaker. This is usually referring to a rule or law.
Examples: We have to be in the airport at least two hours before the flight. I have to work on Saturday. They have to wear their uniforms in school. My doctor said that I have to stop smoking or I'll risk serious problems. (I have no choice). Must shows us that the obligation comes from the speaker.
Examples: I must hand in my thesis by tomorrow. I really must call my parents. I must stop smoking. It’s costing me too much money. (It’s my decision). We use don't have to to show that there is no obligation. You can do something if you want but it is not an obligation.
Examples: You don't have to wear a tie to go to that restaurant but it would be nice. You don't have to wait for me. I could get a taxi. Students don't have to wear uniforms to school.
C. Permission – can, could Can is most often used to ask for or give permission. It is also possible to use could but it is not often used as can. Examples: Can I borrow a pen? Can I go now? Could I open the window?
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REVIEW
Modal This verb form is use to express a degree of certainty about an outcome or the possibility of something.
A. Prohibition – can’t, mustn’t Can't and mustn't (must not) are used to show that something is prohibited or not allowed.
B. Obligation – have to, must Have to and must are both used to express obligation. There is a slight difference in the way both are used. Have to shows that the obligation comes from someone else, not the speaker. This is usually referring to a rule or law.
C. Permission – can, could Can is most often used to ask for or give permission. It is also possible to use could but it is not often used as can.
Group Activity Basketball vs volleyball
Travel with me! Directions: Write a paragraph about giving an advice to tourists when coming to Philippines for a visit or for a vacation. Use modals to express your ideas. Write it in your notebook.
FORMATIVE ASSESSMENT #1 Score 8 above
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DIRECTIONS: Study the following sentences. Write the letter of the correct answer onthe space provided. _____1. Josie has a lot of work tomorrow. She _____ be late. (Prohibition) A. should B. can C. may D. must not _____2. You _____ save some money. (Obligation) A. may B. must C. can D. could _____3. Children _____ respect the elders. (Moral obligation) A. should B. must C. can D. could
_____4. Parents _____ send their children to school. (Moral obligation) A. should B. will C. can D. could _____5. ____ you speak louder when delivering your lines? (Ability) A. Should B. Must C. Can D. Could _____6. You ____ proceed, Ma’am. The delegates are limited. (Prohibition) A. should B. must C. cannot D. could _____7. _______ I smoke here? (Permission) A. Should B. Must C. May D. Could _____8. If you want to lose weight, you ______ eat so much chocolate, so many candies, or drink beer every night. (Obligation) A. should not B. will not C. cannot D. would not _____9. You _____ stop when the traffic light is red. (Obligation) A. may B. must C. can D. could _____10. I ______ write legibly during my grade school days. (Ability in the past) A. might B. should C. can D. could